Compact BOSS KATANA-MINI, featuring equalizer and delay functions. - Brand: BOSS - Model Name: KATANA-MINI - Features: Equalizer, Delay, Level Adjustment - Controls: Gain, Volume, Bass, Middle, Treble, Time - Input Terminals: Input, Power, Headphone Output - Power: Battery or AC Adapter Thank you for viewing. AC adapter is not included. The terminal is broken and stuck in the earphone jack and cannot be removed. (Sound cannot be produced from the speaker unless the terminal is removed.) This is considered a junk item and requires repair. If the terminal can be removed from the earphone jack, it should be usable normally.